I tried looking at the help for responsive and removed 100% from table width, but it didn't have any effect.
I'm not sure what you mean about the icons button in the settings layout. Could you clarify please?
Thanks for your prompt reply. The settings you recommended worked fine for the site based on Protostar, with the arrow-up icon restored as well.
For the site using a Joomlashack template, when I removed 100% from the table width, it made the font tiny and changed its colour to blue. But it looks great with the percentage in place, so it's not a problem. Now I just need the pandemic to end, so I can add more events!